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TIRE DIAGNOSTICS

RADIAL RUN-OUT
GAUGES

Measure wheel and tire radial run-out to help investigate vibration, irregular rotation, and other wheel-service concerns.

THE BASICS

UNDERSTANDING RADIAL RUN-OUT

Radial run-out describes variation in the distance from the center of rotation to the wheel or tire measuring surface.

WHEEL VARIATION

Radial run-out indicates changes in the wheel or tire radius as the assembly rotates.

MULTIPLE CAUSES

Variation may originate in the tire, wheel, or mounting conditions. Measurement helps guide further inspection.

REAL IMPACT

Excessive variation can contribute to vibration and other ride-quality concerns.

WHY IT MATTERS

WHY RADIAL RUN-OUT MEASUREMENT MATTERS

INVESTIGATE VIBRATION

Support investigation of vibration concerns.

IDENTIFY IRREGULAR ROTATION

Observe changes across a complete rotation.

REDUCE UNNECESSARY DIAGNOSTIC WORK

Use measured information to focus the next diagnostic step.

SUPPORT PREVENTIVE MAINTENANCE

Include run-out checks in wheel and tire inspection.

MEASUREMENT PROCESS

HOW TO MEASURE RADIAL RUN-OUT

POSITION THE GAUGE

Set up the gauge on a stable surface and position the roller head against the wheel or tire measuring surface. Adjust the height and angle as needed.

ROTATE THE WHEEL

Slowly rotate the wheel while maintaining consistent contact with the measuring surface. Make a complete rotation to identify high and low spots.

OBSERVE THE READING

Note the highest and lowest readings during the rotation. The total indicated radial run-out (TIR) is the difference between the high and low readings.

GAUGE LINEUP

RADIAL RUN-OUT GAUGES & COMPONENTS

Choose an analog or digital complete gauge, then explore available components and accessories.

RRG-1940-1

ANALOG RADIAL RUN-OUT GAUGE

Complete assembly with analog dial indicator.

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RRG-1940-2

DIGITAL RADIAL RUN-OUT GAUGE

Complete assembly with digital indicator.

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WHAT’S INCLUDED WITH EVERY COMPLETE GAUGE?

Both complete gauges include the four shared components shown below, plus the model-specific indicator: an analog dial indicator for RRG-1940-1 or a digital indicator for RRG-1940-2.

Five components per complete gauge.